MANILA — A magnitude 5 earthquake hit Batangas on Friday morning and shook buildings in Metro Manila and other areas, the Philippine Institute of Volcanology and Seismology (Phivolcs) said, as it warned of possible damage and aftershocks.

The shallow quake struck 14 kilometers southwest of Calaca City around 8:24 a.m. and sent office workers fleeing from their buildings.

"So far everything's okay. No casualties although this is the epicentre," said Rafael Cuevas, a disaster agency official in Calaca city in Batangas province.

"We felt a strong shake... for less than 10 seconds."

Situation in Calaca after a magnitude 5 earthquake. Courtesy of Calaca Mayor Sofronio “Nas” C. Ona Jr.

Situation in Calaca after a magnitude 5 earthquake. Courtesy of Calaca Mayor Sofronio “Nas” C. Ona Jr.

Situation in Calaca after a magnitude 5 earthquake. Courtesy of Calaca Mayor Sofronio “Nas” C. Ona Jr.

Situation in Calaca after a magnitude 5 earthquake. Courtesy of Calaca Mayor Sofronio “Nas” C. Ona Jr.

Situation in Calaca after a magnitude 5 earthquake. Courtesy of Calaca Mayor Sofronio “Nas” C. Ona Jr.

Mabini municipality disaster chief Arnold Panopio said: "At first it was just a slight jolt then it became strong then stopped immediately."

Panopio said no casualties or damage had been reported, but a local high school with around 2,000 students had suspended classes as a precaution.

In Manila, students wearing hard hats and office workers assembled outside buildings, waiting for the all clear to go back inside.

Phivolcs said the quake was felt at the following intensities.

Intensity 5 - Batangas City, and Lemery, Batangas
Intensity 4 - Muntinlupa; Sta. Teresita, BATANGAS
Intensity 3 - Tagaytay City, Cavite; Talisay, San Jose, Lipa, Padre Garcia, and Laurel, Batangas
Intensity 2 - General Trias, Cavite; Pateros, Quezon City, Valenzuela City, Pasay in Metro Manila; Meycauayan, Bulacan; Santa Cruz and San Pablo, Laguna
Intensity 1 - Pasig, Caloocan

— With a report from Agence France-Presse